cgram.y revision 281168
1%{ 2/* $NetBSD: cgram.y,v 1.40 2008/04/25 17:18:24 christos Exp $ */ 3 4/* 5 * Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved. 6 * Copyright (c) 1994, 1995 Jochen Pohl 7 * All Rights Reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Jochen Pohl for 20 * The NetBSD Project. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36#include <sys/cdefs.h> 37#if defined(__RCSID) && !defined(lint) 38__RCSID("$NetBSD: cgram.y,v 1.40 2008/04/25 17:18:24 christos Exp $"); 39#endif 40__FBSDID("$FreeBSD: stable/10/usr.bin/xlint/lint1/cgram.y 281168 2015-04-06 19:56:27Z pfg $"); 41 42#include <stdlib.h> 43#include <string.h> 44#include <limits.h> 45 46#include "lint1.h" 47 48/* 49 * Contains the level of current declaration. 0 is extern. 50 * Used for symbol table entries. 51 */ 52int blklev; 53 54/* 55 * level for memory allocation. Normaly the same as blklev. 56 * An exeption is the declaration of arguments in prototypes. Memory 57 * for these can't be freed after the declaration, but symbols must 58 * be removed from the symbol table after the declaration. 59 */ 60int mblklev; 61 62/* 63 * Save the no-warns state and restore it to avoid the problem where 64 * if (expr) { stmt } / * NOLINT * / stmt; 65 */ 66static int onowarn = -1; 67 68static int toicon(tnode_t *, int); 69static void idecl(sym_t *, int, sbuf_t *); 70static void ignuptorp(void); 71 72#ifdef DEBUG 73static inline void CLRWFLGS(void); 74static inline void CLRWFLGS(void) 75{ 76 printf("%s, %d: clear flags %s %d\n", curr_pos.p_file, 77 curr_pos.p_line, __FILE__, __LINE__); 78 clrwflgs(); 79 onowarn = -1; 80} 81 82static inline void SAVE(void); 83static inline void SAVE(void) 84{ 85 if (onowarn != -1) 86 abort(); 87 printf("%s, %d: save flags %s %d = %d\n", curr_pos.p_file, 88 curr_pos.p_line, __FILE__, __LINE__, nowarn); 89 onowarn = nowarn; 90} 91 92static inline void RESTORE(void); 93static inline void RESTORE(void) 94{ 95 if (onowarn != -1) { 96 nowarn = onowarn; 97 printf("%s, %d: restore flags %s %d = %d\n", curr_pos.p_file, 98 curr_pos.p_line, __FILE__, __LINE__, nowarn); 99 onowarn = -1; 100 } else 101 CLRWFLGS(); 102} 103#else 104#define CLRWFLGS() clrwflgs(), onowarn = -1 105#define SAVE() onowarn = nowarn 106#define RESTORE() (void)(onowarn == -1 ? (clrwflgs(), 0) : (nowarn = onowarn)) 107#endif 108%} 109 110%expect 1 111 112%union { 113 int y_int; 114 val_t *y_val; 115 sbuf_t *y_sb; 116 sym_t *y_sym; 117 op_t y_op; 118 scl_t y_scl; 119 tspec_t y_tspec; 120 tqual_t y_tqual; 121 type_t *y_type; 122 tnode_t *y_tnode; 123 range_t y_range; 124 strg_t *y_strg; 125 pqinf_t *y_pqinf; 126}; 127 128%token T_LBRACE T_RBRACE T_LBRACK T_RBRACK T_LPARN T_RPARN 129%token <y_op> T_STROP 130%token <y_op> T_UNOP 131%token <y_op> T_INCDEC 132%token T_SIZEOF 133%token <y_op> T_MULT 134%token <y_op> T_DIVOP 135%token <y_op> T_ADDOP 136%token <y_op> T_SHFTOP 137%token <y_op> T_RELOP 138%token <y_op> T_EQOP 139%token <y_op> T_AND 140%token <y_op> T_XOR 141%token <y_op> T_OR 142%token <y_op> T_LOGAND 143%token <y_op> T_LOGOR 144%token T_QUEST 145%token T_COLON 146%token <y_op> T_ASSIGN 147%token <y_op> T_OPASS 148%token T_COMMA 149%token T_SEMI 150%token T_ELLIPSE 151 152/* storage classes (extern, static, auto, register and typedef) */ 153%token <y_scl> T_SCLASS 154 155/* types (char, int, short, long, unsigned, signed, float, double, void) */ 156%token <y_tspec> T_TYPE 157 158/* qualifiers (const, volatile) */ 159%token <y_tqual> T_QUAL 160 161/* struct or union */ 162%token <y_tspec> T_SOU 163 164/* enum */ 165%token T_ENUM 166 167/* remaining keywords */ 168%token T_CASE 169%token T_DEFAULT 170%token T_IF 171%token T_ELSE 172%token T_SWITCH 173%token T_DO 174%token T_WHILE 175%token T_FOR 176%token T_GOTO 177%token T_CONTINUE 178%token T_BREAK 179%token T_RETURN 180%token T_ASM 181%token T_SYMBOLRENAME 182 183%left T_COMMA 184%right T_ASSIGN T_OPASS 185%right T_QUEST T_COLON 186%left T_LOGOR 187%left T_LOGAND 188%left T_OR 189%left T_XOR 190%left T_AND 191%left T_EQOP 192%left T_RELOP 193%left T_SHFTOP 194%left T_ADDOP 195%left T_MULT T_DIVOP 196%right T_UNOP T_INCDEC T_SIZEOF 197%left T_LPARN T_LBRACK T_STROP 198 199%token <y_sb> T_NAME 200%token <y_sb> T_TYPENAME 201%token <y_val> T_CON 202%token <y_strg> T_STRING 203 204%type <y_sym> func_decl 205%type <y_sym> notype_decl 206%type <y_sym> type_decl 207%type <y_type> typespec 208%type <y_type> clrtyp_typespec 209%type <y_type> notype_typespec 210%type <y_type> struct_spec 211%type <y_type> enum_spec 212%type <y_sym> struct_tag 213%type <y_sym> enum_tag 214%type <y_tspec> struct 215%type <y_sym> struct_declaration 216%type <y_sb> identifier 217%type <y_sym> member_declaration_list_with_rbrace 218%type <y_sym> member_declaration_list 219%type <y_sym> member_declaration 220%type <y_sym> notype_member_decls 221%type <y_sym> type_member_decls 222%type <y_sym> notype_member_decl 223%type <y_sym> type_member_decl 224%type <y_tnode> constant 225%type <y_sym> enum_declaration 226%type <y_sym> enums_with_opt_comma 227%type <y_sym> enums 228%type <y_sym> enumerator 229%type <y_sym> ename 230%type <y_sym> notype_direct_decl 231%type <y_sym> type_direct_decl 232%type <y_pqinf> pointer 233%type <y_pqinf> asterisk 234%type <y_sym> param_decl 235%type <y_sym> param_list 236%type <y_sym> abs_decl_param_list 237%type <y_sym> direct_param_decl 238%type <y_sym> notype_param_decl 239%type <y_sym> direct_notype_param_decl 240%type <y_pqinf> type_qualifier_list 241%type <y_pqinf> type_qualifier 242%type <y_sym> identifier_list 243%type <y_sym> abs_decl 244%type <y_sym> direct_abs_decl 245%type <y_sym> vararg_parameter_type_list 246%type <y_sym> parameter_type_list 247%type <y_sym> parameter_declaration 248%type <y_tnode> expr 249%type <y_tnode> expr_stmnt_val 250%type <y_tnode> expr_stmnt_list 251%type <y_tnode> term 252%type <y_tnode> func_arg_list 253%type <y_op> point_or_arrow 254%type <y_type> type_name 255%type <y_sym> abstract_declaration 256%type <y_tnode> do_while_expr 257%type <y_tnode> opt_expr 258%type <y_strg> string 259%type <y_strg> string2 260%type <y_sb> opt_asm_or_symbolrename 261%type <y_range> range 262%type <y_range> lorange 263 264 265%% 266 267program: 268 /* empty */ { 269 if (sflag) { 270 /* empty translation unit */ 271 error(272); 272 } else if (!tflag) { 273 /* empty translation unit */ 274 warning(272); 275 } 276 } 277 | translation_unit 278 ; 279 280translation_unit: 281 ext_decl 282 | translation_unit ext_decl 283 ; 284 285ext_decl: 286 asm_stmnt 287 | func_def { 288 glclup(0); 289 CLRWFLGS(); 290 } 291 | data_def { 292 glclup(0); 293 CLRWFLGS(); 294 } 295 ; 296 297data_def: 298 T_SEMI { 299 if (sflag) { 300 /* syntax error: empty declaration */ 301 error(0); 302 } else if (!tflag) { 303 /* syntax error: empty declaration */ 304 warning(0); 305 } 306 } 307 | clrtyp deftyp notype_init_decls T_SEMI { 308 if (sflag) { 309 /* old style declaration; add "int" */ 310 error(1); 311 } else if (!tflag) { 312 /* old style declaration; add "int" */ 313 warning(1); 314 } 315 } 316 | declmods deftyp T_SEMI { 317 if (dcs->d_scl == TYPEDEF) { 318 /* typedef declares no type name */ 319 warning(72); 320 } else { 321 /* empty declaration */ 322 warning(2); 323 } 324 } 325 | declmods deftyp notype_init_decls T_SEMI 326 | declspecs deftyp T_SEMI { 327 if (dcs->d_scl == TYPEDEF) { 328 /* typedef declares no type name */ 329 warning(72); 330 } else if (!dcs->d_nedecl) { 331 /* empty declaration */ 332 warning(2); 333 } 334 } 335 | declspecs deftyp type_init_decls T_SEMI 336 | error T_SEMI { 337 globclup(); 338 } 339 | error T_RBRACE { 340 globclup(); 341 } 342 ; 343 344func_def: 345 func_decl { 346 if ($1->s_type->t_tspec != FUNC) { 347 /* syntax error */ 348 error(249); 349 YYERROR; 350 } 351 if ($1->s_type->t_typedef) { 352 /* ()-less function definition */ 353 error(64); 354 YYERROR; 355 } 356 funcdef($1); 357 blklev++; 358 pushdecl(ARG); 359 } opt_arg_declaration_list { 360 popdecl(); 361 blklev--; 362 cluparg(); 363 pushctrl(0); 364 } comp_stmnt { 365 funcend(); 366 popctrl(0); 367 } 368 ; 369 370func_decl: 371 clrtyp deftyp notype_decl { 372 $$ = $3; 373 } 374 | declmods deftyp notype_decl { 375 $$ = $3; 376 } 377 | declspecs deftyp type_decl { 378 $$ = $3; 379 } 380 ; 381 382opt_arg_declaration_list: 383 /* empty */ 384 | arg_declaration_list 385 ; 386 387arg_declaration_list: 388 arg_declaration 389 | arg_declaration_list arg_declaration 390 /* XXX or better "arg_declaration error" ? */ 391 | error 392 ; 393 394/* 395 * "arg_declaration" is separated from "declaration" because it 396 * needs other error handling. 397 */ 398 399arg_declaration: 400 declmods deftyp T_SEMI { 401 /* empty declaration */ 402 warning(2); 403 } 404 | declmods deftyp notype_init_decls T_SEMI 405 | declspecs deftyp T_SEMI { 406 if (!dcs->d_nedecl) { 407 /* empty declaration */ 408 warning(2); 409 } else { 410 tspec_t ts = dcs->d_type->t_tspec; 411 /* %s declared in argument declaration list */ 412 warning(3, ts == STRUCT ? "struct" : 413 (ts == UNION ? "union" : "enum")); 414 } 415 } 416 | declspecs deftyp type_init_decls T_SEMI { 417 if (dcs->d_nedecl) { 418 tspec_t ts = dcs->d_type->t_tspec; 419 /* %s declared in argument declaration list */ 420 warning(3, ts == STRUCT ? "struct" : 421 (ts == UNION ? "union" : "enum")); 422 } 423 } 424 | declmods error 425 | declspecs error 426 ; 427 428declaration: 429 declmods deftyp T_SEMI { 430 if (dcs->d_scl == TYPEDEF) { 431 /* typedef declares no type name */ 432 warning(72); 433 } else { 434 /* empty declaration */ 435 warning(2); 436 } 437 } 438 | declmods deftyp notype_init_decls T_SEMI 439 | declspecs deftyp T_SEMI { 440 if (dcs->d_scl == TYPEDEF) { 441 /* typedef declares no type name */ 442 warning(72); 443 } else if (!dcs->d_nedecl) { 444 /* empty declaration */ 445 warning(2); 446 } 447 } 448 | declspecs deftyp type_init_decls T_SEMI 449 | error T_SEMI 450 ; 451 452clrtyp: 453 { 454 clrtyp(); 455 } 456 ; 457 458deftyp: 459 /* empty */ { 460 deftyp(); 461 } 462 ; 463 464declspecs: 465 clrtyp_typespec { 466 addtype($1); 467 } 468 | declmods typespec { 469 addtype($2); 470 } 471 | declspecs declmod 472 | declspecs notype_typespec { 473 addtype($2); 474 } 475 ; 476 477declmods: 478 clrtyp T_QUAL { 479 addqual($2); 480 } 481 | clrtyp T_SCLASS { 482 addscl($2); 483 } 484 | declmods declmod 485 ; 486 487declmod: 488 T_QUAL { 489 addqual($1); 490 } 491 | T_SCLASS { 492 addscl($1); 493 } 494 ; 495 496clrtyp_typespec: 497 clrtyp notype_typespec { 498 $$ = $2; 499 } 500 | T_TYPENAME clrtyp { 501 $$ = getsym($1)->s_type; 502 } 503 ; 504 505typespec: 506 notype_typespec { 507 $$ = $1; 508 } 509 | T_TYPENAME { 510 $$ = getsym($1)->s_type; 511 } 512 ; 513 514notype_typespec: 515 T_TYPE { 516 $$ = gettyp($1); 517 } 518 | struct_spec { 519 popdecl(); 520 $$ = $1; 521 } 522 | enum_spec { 523 popdecl(); 524 $$ = $1; 525 } 526 ; 527 528struct_spec: 529 struct struct_tag { 530 /* 531 * STDC requires that "struct a;" always introduces 532 * a new tag if "a" is not declared at current level 533 * 534 * yychar is valid because otherwise the parser would 535 * not been able to deceide if he must shift or reduce 536 */ 537 $$ = mktag($2, $1, 0, yychar == T_SEMI); 538 } 539 | struct struct_tag { 540 dcs->d_tagtyp = mktag($2, $1, 1, 0); 541 } struct_declaration { 542 $$ = compltag(dcs->d_tagtyp, $4); 543 } 544 | struct { 545 dcs->d_tagtyp = mktag(NULL, $1, 1, 0); 546 } struct_declaration { 547 $$ = compltag(dcs->d_tagtyp, $3); 548 } 549 | struct error { 550 symtyp = FVFT; 551 $$ = gettyp(INT); 552 } 553 ; 554 555struct: 556 T_SOU { 557 symtyp = FTAG; 558 pushdecl($1 == STRUCT ? MOS : MOU); 559 dcs->d_offset = 0; 560 dcs->d_stralign = CHAR_BIT; 561 $$ = $1; 562 } 563 ; 564 565struct_tag: 566 identifier { 567 $$ = getsym($1); 568 } 569 ; 570 571struct_declaration: 572 struct_decl_lbrace member_declaration_list_with_rbrace { 573 $$ = $2; 574 } 575 ; 576 577struct_decl_lbrace: 578 T_LBRACE { 579 symtyp = FVFT; 580 } 581 ; 582 583member_declaration_list_with_rbrace: 584 member_declaration_list T_SEMI T_RBRACE { 585 $$ = $1; 586 } 587 | member_declaration_list T_RBRACE { 588 if (sflag) { 589 /* syntax req. ";" after last struct/union member */ 590 error(66); 591 } else { 592 /* syntax req. ";" after last struct/union member */ 593 warning(66); 594 } 595 $$ = $1; 596 } 597 | T_RBRACE { 598 $$ = NULL; 599 } 600 ; 601 602member_declaration_list: 603 member_declaration { 604 $$ = $1; 605 } 606 | member_declaration_list T_SEMI member_declaration { 607 $$ = lnklst($1, $3); 608 } 609 ; 610 611member_declaration: 612 noclass_declmods deftyp { 613 /* too late, i know, but getsym() compensates it */ 614 symtyp = FMOS; 615 } notype_member_decls { 616 symtyp = FVFT; 617 $$ = $4; 618 } 619 | noclass_declspecs deftyp { 620 symtyp = FMOS; 621 } type_member_decls { 622 symtyp = FVFT; 623 $$ = $4; 624 } 625 | noclass_declmods deftyp { 626 /* struct or union member must be named */ 627 warning(49); 628 $$ = NULL; 629 } 630 | noclass_declspecs deftyp { 631 /* struct or union member must be named */ 632 warning(49); 633 $$ = NULL; 634 } 635 | error { 636 symtyp = FVFT; 637 $$ = NULL; 638 } 639 ; 640 641noclass_declspecs: 642 clrtyp_typespec { 643 addtype($1); 644 } 645 | noclass_declmods typespec { 646 addtype($2); 647 } 648 | noclass_declspecs T_QUAL { 649 addqual($2); 650 } 651 | noclass_declspecs notype_typespec { 652 addtype($2); 653 } 654 ; 655 656noclass_declmods: 657 clrtyp T_QUAL { 658 addqual($2); 659 } 660 | noclass_declmods T_QUAL { 661 addqual($2); 662 } 663 ; 664 665notype_member_decls: 666 notype_member_decl { 667 $$ = decl1str($1); 668 } 669 | notype_member_decls { 670 symtyp = FMOS; 671 } T_COMMA type_member_decl { 672 $$ = lnklst($1, decl1str($4)); 673 } 674 ; 675 676type_member_decls: 677 type_member_decl { 678 $$ = decl1str($1); 679 } 680 | type_member_decls { 681 symtyp = FMOS; 682 } T_COMMA type_member_decl { 683 $$ = lnklst($1, decl1str($4)); 684 } 685 ; 686 687notype_member_decl: 688 notype_decl { 689 $$ = $1; 690 } 691 | notype_decl T_COLON constant { 692 $$ = bitfield($1, toicon($3, 1)); 693 } 694 | { 695 symtyp = FVFT; 696 } T_COLON constant { 697 $$ = bitfield(NULL, toicon($3, 1)); 698 } 699 ; 700 701type_member_decl: 702 type_decl { 703 $$ = $1; 704 } 705 | type_decl T_COLON constant { 706 $$ = bitfield($1, toicon($3, 1)); 707 } 708 | { 709 symtyp = FVFT; 710 } T_COLON constant { 711 $$ = bitfield(NULL, toicon($3, 1)); 712 } 713 ; 714 715enum_spec: 716 enum enum_tag { 717 $$ = mktag($2, ENUM, 0, 0); 718 } 719 | enum enum_tag { 720 dcs->d_tagtyp = mktag($2, ENUM, 1, 0); 721 } enum_declaration { 722 $$ = compltag(dcs->d_tagtyp, $4); 723 } 724 | enum { 725 dcs->d_tagtyp = mktag(NULL, ENUM, 1, 0); 726 } enum_declaration { 727 $$ = compltag(dcs->d_tagtyp, $3); 728 } 729 | enum error { 730 symtyp = FVFT; 731 $$ = gettyp(INT); 732 } 733 ; 734 735enum: 736 T_ENUM { 737 symtyp = FTAG; 738 pushdecl(ENUMCON); 739 } 740 ; 741 742enum_tag: 743 identifier { 744 $$ = getsym($1); 745 } 746 ; 747 748enum_declaration: 749 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 750 $$ = $2; 751 } 752 ; 753 754enum_decl_lbrace: 755 T_LBRACE { 756 symtyp = FVFT; 757 enumval = 0; 758 } 759 ; 760 761enums_with_opt_comma: 762 enums { 763 $$ = $1; 764 } 765 | enums T_COMMA { 766 if (sflag) { 767 /* trailing "," prohibited in enum declaration */ 768 error(54); 769 } else { 770 /* trailing "," prohibited in enum declaration */ 771 (void)gnuism(54); 772 } 773 $$ = $1; 774 } 775 ; 776 777enums: 778 enumerator { 779 $$ = $1; 780 } 781 | enums T_COMMA enumerator { 782 $$ = lnklst($1, $3); 783 } 784 | error { 785 $$ = NULL; 786 } 787 ; 788 789enumerator: 790 ename { 791 $$ = ename($1, enumval, 1); 792 } 793 | ename T_ASSIGN constant { 794 $$ = ename($1, toicon($3, 1), 0); 795 } 796 ; 797 798ename: 799 identifier { 800 $$ = getsym($1); 801 } 802 ; 803 804 805notype_init_decls: 806 notype_init_decl 807 | notype_init_decls T_COMMA type_init_decl 808 ; 809 810type_init_decls: 811 type_init_decl 812 | type_init_decls T_COMMA type_init_decl 813 ; 814 815notype_init_decl: 816 notype_decl opt_asm_or_symbolrename { 817 idecl($1, 0, $2); 818 chksz($1); 819 } 820 | notype_decl opt_asm_or_symbolrename { 821 idecl($1, 1, $2); 822 } T_ASSIGN initializer { 823 chksz($1); 824 } 825 ; 826 827type_init_decl: 828 type_decl opt_asm_or_symbolrename { 829 idecl($1, 0, $2); 830 chksz($1); 831 } 832 | type_decl opt_asm_or_symbolrename { 833 idecl($1, 1, $2); 834 } T_ASSIGN initializer { 835 chksz($1); 836 } 837 ; 838 839notype_decl: 840 notype_direct_decl { 841 $$ = $1; 842 } 843 | pointer notype_direct_decl { 844 $$ = addptr($2, $1); 845 } 846 ; 847 848notype_direct_decl: 849 T_NAME { 850 $$ = dname(getsym($1)); 851 } 852 | T_LPARN type_decl T_RPARN { 853 $$ = $2; 854 } 855 | notype_direct_decl T_LBRACK T_RBRACK { 856 $$ = addarray($1, 0, 0); 857 } 858 | notype_direct_decl T_LBRACK constant T_RBRACK { 859 $$ = addarray($1, 1, toicon($3, 0)); 860 } 861 | notype_direct_decl param_list { 862 $$ = addfunc($1, $2); 863 popdecl(); 864 blklev--; 865 } 866 ; 867 868type_decl: 869 type_direct_decl { 870 $$ = $1; 871 } 872 | pointer type_direct_decl { 873 $$ = addptr($2, $1); 874 } 875 ; 876 877type_direct_decl: 878 identifier { 879 $$ = dname(getsym($1)); 880 } 881 | T_LPARN type_decl T_RPARN { 882 $$ = $2; 883 } 884 | type_direct_decl T_LBRACK T_RBRACK { 885 $$ = addarray($1, 0, 0); 886 } 887 | type_direct_decl T_LBRACK constant T_RBRACK { 888 $$ = addarray($1, 1, toicon($3, 0)); 889 } 890 | type_direct_decl param_list { 891 $$ = addfunc($1, $2); 892 popdecl(); 893 blklev--; 894 } 895 ; 896 897/* 898 * param_decl and notype_param_decl exist to avoid a conflict in 899 * argument lists. A typename enclosed in parens should always be 900 * treated as a typename, not an argument. 901 * "typedef int a; f(int (a));" is "typedef int a; f(int foo(a));" 902 * not "typedef int a; f(int a);" 903 */ 904param_decl: 905 direct_param_decl { 906 $$ = $1; 907 } 908 | pointer direct_param_decl { 909 $$ = addptr($2, $1); 910 } 911 ; 912 913direct_param_decl: 914 identifier { 915 $$ = dname(getsym($1)); 916 } 917 | T_LPARN notype_param_decl T_RPARN { 918 $$ = $2; 919 } 920 | direct_param_decl T_LBRACK T_RBRACK { 921 $$ = addarray($1, 0, 0); 922 } 923 | direct_param_decl T_LBRACK constant T_RBRACK { 924 $$ = addarray($1, 1, toicon($3, 0)); 925 } 926 | direct_param_decl param_list { 927 $$ = addfunc($1, $2); 928 popdecl(); 929 blklev--; 930 } 931 ; 932 933notype_param_decl: 934 direct_notype_param_decl { 935 $$ = $1; 936 } 937 | pointer direct_notype_param_decl { 938 $$ = addptr($2, $1); 939 } 940 ; 941 942direct_notype_param_decl: 943 T_NAME { 944 $$ = dname(getsym($1)); 945 } 946 | T_LPARN notype_param_decl T_RPARN { 947 $$ = $2; 948 } 949 | direct_notype_param_decl T_LBRACK T_RBRACK { 950 $$ = addarray($1, 0, 0); 951 } 952 | direct_notype_param_decl T_LBRACK constant T_RBRACK { 953 $$ = addarray($1, 1, toicon($3, 0)); 954 } 955 | direct_notype_param_decl param_list { 956 $$ = addfunc($1, $2); 957 popdecl(); 958 blklev--; 959 } 960 ; 961 962pointer: 963 asterisk { 964 $$ = $1; 965 } 966 | asterisk type_qualifier_list { 967 $$ = mergepq($1, $2); 968 } 969 | asterisk pointer { 970 $$ = mergepq($1, $2); 971 } 972 | asterisk type_qualifier_list pointer { 973 $$ = mergepq(mergepq($1, $2), $3); 974 } 975 ; 976 977asterisk: 978 T_MULT { 979 $$ = xcalloc(1, sizeof (pqinf_t)); 980 $$->p_pcnt = 1; 981 } 982 ; 983 984type_qualifier_list: 985 type_qualifier { 986 $$ = $1; 987 } 988 | type_qualifier_list type_qualifier { 989 $$ = mergepq($1, $2); 990 } 991 ; 992 993type_qualifier: 994 T_QUAL { 995 $$ = xcalloc(1, sizeof (pqinf_t)); 996 if ($1 == CONST) { 997 $$->p_const = 1; 998 } else { 999 $$->p_volatile = 1; 1000 } 1001 } 1002 ; 1003 1004param_list: 1005 id_list_lparn identifier_list T_RPARN { 1006 $$ = $2; 1007 } 1008 | abs_decl_param_list { 1009 $$ = $1; 1010 } 1011 ; 1012 1013id_list_lparn: 1014 T_LPARN { 1015 blklev++; 1016 pushdecl(PARG); 1017 } 1018 ; 1019 1020identifier_list: 1021 T_NAME { 1022 $$ = iname(getsym($1)); 1023 } 1024 | identifier_list T_COMMA T_NAME { 1025 $$ = lnklst($1, iname(getsym($3))); 1026 } 1027 | identifier_list error { 1028 $$ = $1; 1029 } 1030 ; 1031 1032abs_decl_param_list: 1033 abs_decl_lparn T_RPARN { 1034 $$ = NULL; 1035 } 1036 | abs_decl_lparn vararg_parameter_type_list T_RPARN { 1037 dcs->d_proto = 1; 1038 $$ = $2; 1039 } 1040 | abs_decl_lparn error T_RPARN { 1041 $$ = NULL; 1042 } 1043 ; 1044 1045abs_decl_lparn: 1046 T_LPARN { 1047 blklev++; 1048 pushdecl(PARG); 1049 } 1050 ; 1051 1052vararg_parameter_type_list: 1053 parameter_type_list { 1054 $$ = $1; 1055 } 1056 | parameter_type_list T_COMMA T_ELLIPSE { 1057 dcs->d_vararg = 1; 1058 $$ = $1; 1059 } 1060 | T_ELLIPSE { 1061 if (sflag) { 1062 /* ANSI C requires formal parameter before "..." */ 1063 error(84); 1064 } else if (!tflag) { 1065 /* ANSI C requires formal parameter before "..." */ 1066 warning(84); 1067 } 1068 dcs->d_vararg = 1; 1069 $$ = NULL; 1070 } 1071 ; 1072 1073parameter_type_list: 1074 parameter_declaration { 1075 $$ = $1; 1076 } 1077 | parameter_type_list T_COMMA parameter_declaration { 1078 $$ = lnklst($1, $3); 1079 } 1080 ; 1081 1082parameter_declaration: 1083 declmods deftyp { 1084 $$ = decl1arg(aname(), 0); 1085 } 1086 | declspecs deftyp { 1087 $$ = decl1arg(aname(), 0); 1088 } 1089 | declmods deftyp notype_param_decl { 1090 $$ = decl1arg($3, 0); 1091 } 1092 /* 1093 * param_decl is needed because of following conflict: 1094 * "typedef int a; f(int (a));" could be parsed as 1095 * "function with argument a of type int", or 1096 * "function with an abstract argument of type function". 1097 * This grammar realizes the second case. 1098 */ 1099 | declspecs deftyp param_decl { 1100 $$ = decl1arg($3, 0); 1101 } 1102 | declmods deftyp abs_decl { 1103 $$ = decl1arg($3, 0); 1104 } 1105 | declspecs deftyp abs_decl { 1106 $$ = decl1arg($3, 0); 1107 } 1108 ; 1109 1110opt_asm_or_symbolrename: /* expect only one */ 1111 /* empty */ { 1112 $$ = NULL; 1113 } 1114 | T_ASM T_LPARN T_STRING T_RPARN { 1115 freeyyv(&$3, T_STRING); 1116 $$ = NULL; 1117 } 1118 | T_SYMBOLRENAME T_LPARN T_NAME T_RPARN { 1119 $$ = $3; 1120 } 1121 ; 1122 1123initializer: 1124 init_expr 1125 ; 1126 1127init_expr: 1128 expr %prec T_COMMA { 1129 mkinit($1); 1130 } 1131 | init_by_name init_expr %prec T_COMMA 1132 | init_lbrace init_expr_list init_rbrace 1133 | init_lbrace init_expr_list T_COMMA init_rbrace 1134 | error 1135 ; 1136 1137init_expr_list: 1138 init_expr %prec T_COMMA 1139 | init_expr_list T_COMMA init_expr 1140 ; 1141 1142lorange: 1143 constant T_ELLIPSE { 1144 $$.lo = toicon($1, 1); 1145 } 1146 ; 1147range: 1148 constant { 1149 $$.lo = toicon($1, 1); 1150 $$.hi = $$.lo + 1; 1151 } 1152 | lorange constant { 1153 $$.lo = $1.lo; 1154 $$.hi = toicon($2, 1); 1155 } 1156 ; 1157 1158init_by_name: 1159 T_LBRACK range T_RBRACK T_ASSIGN { 1160 if (!Sflag) 1161 warning(321); 1162 } 1163 | point identifier T_ASSIGN { 1164 if (!Sflag) 1165 warning(313); 1166 memberpush($2); 1167 } 1168 | identifier T_COLON { 1169 gnuism(315); 1170 memberpush($1); 1171 } 1172 ; 1173 1174init_lbrace: 1175 T_LBRACE { 1176 initlbr(); 1177 } 1178 ; 1179 1180init_rbrace: 1181 T_RBRACE { 1182 initrbr(); 1183 } 1184 ; 1185 1186type_name: 1187 { 1188 pushdecl(ABSTRACT); 1189 } abstract_declaration { 1190 popdecl(); 1191 $$ = $2->s_type; 1192 } 1193 ; 1194 1195abstract_declaration: 1196 noclass_declmods deftyp { 1197 $$ = decl1abs(aname()); 1198 } 1199 | noclass_declspecs deftyp { 1200 $$ = decl1abs(aname()); 1201 } 1202 | noclass_declmods deftyp abs_decl { 1203 $$ = decl1abs($3); 1204 } 1205 | noclass_declspecs deftyp abs_decl { 1206 $$ = decl1abs($3); 1207 } 1208 ; 1209 1210abs_decl: 1211 pointer { 1212 $$ = addptr(aname(), $1); 1213 } 1214 | direct_abs_decl { 1215 $$ = $1; 1216 } 1217 | pointer direct_abs_decl { 1218 $$ = addptr($2, $1); 1219 } 1220 ; 1221 1222direct_abs_decl: 1223 T_LPARN abs_decl T_RPARN { 1224 $$ = $2; 1225 } 1226 | T_LBRACK T_RBRACK { 1227 $$ = addarray(aname(), 0, 0); 1228 } 1229 | T_LBRACK constant T_RBRACK { 1230 $$ = addarray(aname(), 1, toicon($2, 0)); 1231 } 1232 | direct_abs_decl T_LBRACK T_RBRACK { 1233 $$ = addarray($1, 0, 0); 1234 } 1235 | direct_abs_decl T_LBRACK constant T_RBRACK { 1236 $$ = addarray($1, 1, toicon($3, 0)); 1237 } 1238 | abs_decl_param_list { 1239 $$ = addfunc(aname(), $1); 1240 popdecl(); 1241 blklev--; 1242 } 1243 | direct_abs_decl abs_decl_param_list { 1244 $$ = addfunc($1, $2); 1245 popdecl(); 1246 blklev--; 1247 } 1248 ; 1249 1250non_expr_stmnt: 1251 labeled_stmnt 1252 | comp_stmnt 1253 | selection_stmnt 1254 | iteration_stmnt 1255 | jump_stmnt { 1256 ftflg = 0; 1257 } 1258 | asm_stmnt 1259 1260stmnt: 1261 expr_stmnt 1262 | non_expr_stmnt 1263 ; 1264 1265labeled_stmnt: 1266 label stmnt 1267 ; 1268 1269label: 1270 identifier T_COLON { 1271 symtyp = FLAB; 1272 label(T_NAME, getsym($1), NULL); 1273 } 1274 | T_CASE constant T_COLON { 1275 label(T_CASE, NULL, $2); 1276 ftflg = 1; 1277 } 1278 | T_CASE constant T_ELLIPSE constant T_COLON { 1279 /* XXX: We don't fill all cases */ 1280 label(T_CASE, NULL, $2); 1281 ftflg = 1; 1282 } 1283 | T_DEFAULT T_COLON { 1284 label(T_DEFAULT, NULL, NULL); 1285 ftflg = 1; 1286 } 1287 ; 1288 1289comp_stmnt: 1290 comp_stmnt_lbrace declaration_list opt_stmnt_list comp_stmnt_rbrace 1291 | comp_stmnt_lbrace opt_stmnt_list comp_stmnt_rbrace 1292 ; 1293 1294comp_stmnt_lbrace: 1295 T_LBRACE { 1296 blklev++; 1297 mblklev++; 1298 pushdecl(AUTO); 1299 } 1300 ; 1301 1302comp_stmnt_rbrace: 1303 T_RBRACE { 1304 popdecl(); 1305 freeblk(); 1306 mblklev--; 1307 blklev--; 1308 ftflg = 0; 1309 } 1310 ; 1311 1312opt_stmnt_list: 1313 /* empty */ 1314 | stmnt_list 1315 ; 1316 1317stmnt_list: 1318 stmnt 1319 | stmnt_list stmnt { 1320 RESTORE(); 1321 } 1322 | stmnt_list error T_SEMI 1323 ; 1324 1325expr_stmnt: 1326 expr T_SEMI { 1327 expr($1, 0, 0, 1); 1328 ftflg = 0; 1329 } 1330 | T_SEMI { 1331 ftflg = 0; 1332 } 1333 ; 1334 1335/* 1336 * The following two productions are used to implement 1337 * ({ [[decl-list] stmt-list] }). 1338 * XXX: This is not well tested. 1339 */ 1340expr_stmnt_val: 1341 expr T_SEMI { 1342 /* XXX: We should really do that only on the last name */ 1343 if ($1->tn_op == NAME) 1344 $1->tn_sym->s_used = 1; 1345 $$ = $1; 1346 expr($1, 0, 0, 0); 1347 ftflg = 0; 1348 } 1349 | non_expr_stmnt { 1350 $$ = getnode(); 1351 $$->tn_type = gettyp(VOID); 1352 } 1353 ; 1354 1355expr_stmnt_list: 1356 expr_stmnt_val 1357 | expr_stmnt_list expr_stmnt_val { 1358 $$ = $2; 1359 } 1360 | expr_stmnt_list expr_stmnt_val 1361 ; 1362 1363selection_stmnt: 1364 if_without_else { 1365 SAVE(); 1366 if2(); 1367 if3(0); 1368 } 1369 | if_without_else T_ELSE { 1370 SAVE(); 1371 if2(); 1372 } stmnt { 1373 CLRWFLGS(); 1374 if3(1); 1375 } 1376 | if_without_else T_ELSE error { 1377 CLRWFLGS(); 1378 if3(0); 1379 } 1380 | switch_expr stmnt { 1381 CLRWFLGS(); 1382 switch2(); 1383 } 1384 | switch_expr error { 1385 CLRWFLGS(); 1386 switch2(); 1387 } 1388 ; 1389 1390if_without_else: 1391 if_expr stmnt 1392 | if_expr error 1393 ; 1394 1395if_expr: 1396 T_IF T_LPARN expr T_RPARN { 1397 if1($3); 1398 CLRWFLGS(); 1399 } 1400 ; 1401 1402switch_expr: 1403 T_SWITCH T_LPARN expr T_RPARN { 1404 switch1($3); 1405 CLRWFLGS(); 1406 } 1407 ; 1408 1409do_stmnt: 1410 do stmnt { 1411 CLRWFLGS(); 1412 } 1413 ; 1414 1415iteration_stmnt: 1416 while_expr stmnt { 1417 CLRWFLGS(); 1418 while2(); 1419 } 1420 | while_expr error { 1421 CLRWFLGS(); 1422 while2(); 1423 } 1424 | do_stmnt do_while_expr { 1425 do2($2); 1426 ftflg = 0; 1427 } 1428 | do error { 1429 CLRWFLGS(); 1430 do2(NULL); 1431 } 1432 | for_exprs stmnt { 1433 CLRWFLGS(); 1434 for2(); 1435 } 1436 | for_exprs error { 1437 CLRWFLGS(); 1438 for2(); 1439 } 1440 ; 1441 1442while_expr: 1443 T_WHILE T_LPARN expr T_RPARN { 1444 while1($3); 1445 CLRWFLGS(); 1446 } 1447 ; 1448 1449do: 1450 T_DO { 1451 do1(); 1452 } 1453 ; 1454 1455do_while_expr: 1456 T_WHILE T_LPARN expr T_RPARN T_SEMI { 1457 $$ = $3; 1458 } 1459 ; 1460 1461for_exprs: 1462 T_FOR T_LPARN opt_expr T_SEMI opt_expr T_SEMI opt_expr T_RPARN { 1463 for1($3, $5, $7); 1464 CLRWFLGS(); 1465 } 1466 ; 1467 1468opt_expr: 1469 /* empty */ { 1470 $$ = NULL; 1471 } 1472 | expr { 1473 $$ = $1; 1474 } 1475 ; 1476 1477jump_stmnt: 1478 goto identifier T_SEMI { 1479 dogoto(getsym($2)); 1480 } 1481 | goto error T_SEMI { 1482 symtyp = FVFT; 1483 } 1484 | T_CONTINUE T_SEMI { 1485 docont(); 1486 } 1487 | T_BREAK T_SEMI { 1488 dobreak(); 1489 } 1490 | T_RETURN T_SEMI { 1491 doreturn(NULL); 1492 } 1493 | T_RETURN expr T_SEMI { 1494 doreturn($2); 1495 } 1496 ; 1497 1498goto: 1499 T_GOTO { 1500 symtyp = FLAB; 1501 } 1502 ; 1503 1504asm_stmnt: 1505 T_ASM T_LPARN read_until_rparn T_SEMI { 1506 setasm(); 1507 } 1508 | T_ASM T_QUAL T_LPARN read_until_rparn T_SEMI { 1509 setasm(); 1510 } 1511 | T_ASM error 1512 ; 1513 1514read_until_rparn: 1515 /* empty */ { 1516 ignuptorp(); 1517 } 1518 ; 1519 1520declaration_list: 1521 declaration { 1522 CLRWFLGS(); 1523 } 1524 | declaration_list declaration { 1525 CLRWFLGS(); 1526 } 1527 ; 1528 1529constant: 1530 expr %prec T_COMMA { 1531 $$ = $1; 1532 } 1533 ; 1534 1535expr: 1536 expr T_MULT expr { 1537 $$ = build(MULT, $1, $3); 1538 } 1539 | expr T_DIVOP expr { 1540 $$ = build($2, $1, $3); 1541 } 1542 | expr T_ADDOP expr { 1543 $$ = build($2, $1, $3); 1544 } 1545 | expr T_SHFTOP expr { 1546 $$ = build($2, $1, $3); 1547 } 1548 | expr T_RELOP expr { 1549 $$ = build($2, $1, $3); 1550 } 1551 | expr T_EQOP expr { 1552 $$ = build($2, $1, $3); 1553 } 1554 | expr T_AND expr { 1555 $$ = build(AND, $1, $3); 1556 } 1557 | expr T_XOR expr { 1558 $$ = build(XOR, $1, $3); 1559 } 1560 | expr T_OR expr { 1561 $$ = build(OR, $1, $3); 1562 } 1563 | expr T_LOGAND expr { 1564 $$ = build(LOGAND, $1, $3); 1565 } 1566 | expr T_LOGOR expr { 1567 $$ = build(LOGOR, $1, $3); 1568 } 1569 | expr T_QUEST expr T_COLON expr { 1570 $$ = build(QUEST, $1, build(COLON, $3, $5)); 1571 } 1572 | expr T_ASSIGN expr { 1573 $$ = build(ASSIGN, $1, $3); 1574 } 1575 | expr T_OPASS expr { 1576 $$ = build($2, $1, $3); 1577 } 1578 | expr T_COMMA expr { 1579 $$ = build(COMMA, $1, $3); 1580 } 1581 | term { 1582 $$ = $1; 1583 } 1584 ; 1585 1586term: 1587 T_NAME { 1588 /* XXX really necessary? */ 1589 if (yychar < 0) 1590 yychar = yylex(); 1591 $$ = getnnode(getsym($1), yychar); 1592 } 1593 | string { 1594 $$ = getsnode($1); 1595 } 1596 | T_CON { 1597 $$ = getcnode(gettyp($1->v_tspec), $1); 1598 } 1599 | T_LPARN expr T_RPARN { 1600 if ($2 != NULL) 1601 $2->tn_parn = 1; 1602 $$ = $2; 1603 } 1604 | T_LPARN comp_stmnt_lbrace declaration_list expr_stmnt_list { 1605 blklev--; 1606 mblklev--; 1607 initsym = mktempsym(duptyp($4->tn_type)); 1608 mblklev++; 1609 blklev++; 1610 gnuism(320); 1611 } comp_stmnt_rbrace T_RPARN { 1612 $$ = getnnode(initsym, 0); 1613 } 1614 | T_LPARN comp_stmnt_lbrace expr_stmnt_list { 1615 blklev--; 1616 mblklev--; 1617 initsym = mktempsym($3->tn_type); 1618 mblklev++; 1619 blklev++; 1620 gnuism(320); 1621 } comp_stmnt_rbrace T_RPARN { 1622 $$ = getnnode(initsym, 0); 1623 } 1624 | term T_INCDEC { 1625 $$ = build($2 == INC ? INCAFT : DECAFT, $1, NULL); 1626 } 1627 | T_INCDEC term { 1628 $$ = build($1 == INC ? INCBEF : DECBEF, $2, NULL); 1629 } 1630 | T_MULT term { 1631 $$ = build(STAR, $2, NULL); 1632 } 1633 | T_AND term { 1634 $$ = build(AMPER, $2, NULL); 1635 } 1636 | T_UNOP term { 1637 $$ = build($1, $2, NULL); 1638 } 1639 | T_ADDOP term { 1640 if (tflag && $1 == PLUS) { 1641 /* unary + is illegal in traditional C */ 1642 warning(100); 1643 } 1644 $$ = build($1 == PLUS ? UPLUS : UMINUS, $2, NULL); 1645 } 1646 | term T_LBRACK expr T_RBRACK { 1647 $$ = build(STAR, build(PLUS, $1, $3), NULL); 1648 } 1649 | term T_LPARN T_RPARN { 1650 $$ = funccall($1, NULL); 1651 } 1652 | term T_LPARN func_arg_list T_RPARN { 1653 $$ = funccall($1, $3); 1654 } 1655 | term point_or_arrow T_NAME { 1656 if ($1 != NULL) { 1657 sym_t *msym; 1658 /* XXX strmemb should be integrated in build() */ 1659 if ($2 == ARROW) { 1660 /* must to this before strmemb is called */ 1661 $1 = cconv($1); 1662 } 1663 msym = strmemb($1, $2, getsym($3)); 1664 $$ = build($2, $1, getnnode(msym, 0)); 1665 } else { 1666 $$ = NULL; 1667 } 1668 } 1669 | T_SIZEOF term %prec T_SIZEOF { 1670 if (($$ = $2 == NULL ? NULL : bldszof($2->tn_type)) != NULL) 1671 chkmisc($2, 0, 0, 0, 0, 0, 1); 1672 } 1673 | T_SIZEOF T_LPARN type_name T_RPARN %prec T_SIZEOF { 1674 $$ = bldszof($3); 1675 } 1676 | T_LPARN type_name T_RPARN term %prec T_UNOP { 1677 $$ = cast($4, $2); 1678 } 1679 | T_LPARN type_name T_RPARN %prec T_UNOP { 1680 sym_t *tmp = mktempsym($2); 1681 idecl(tmp, 1, NULL); 1682 } init_lbrace init_expr_list init_rbrace { 1683 if (!Sflag) 1684 gnuism(319); 1685 $$ = getnnode(initsym, 0); 1686 } 1687 ; 1688 1689string: 1690 T_STRING { 1691 $$ = $1; 1692 } 1693 | T_STRING string2 { 1694 $$ = catstrg($1, $2); 1695 } 1696 ; 1697 1698string2: 1699 T_STRING { 1700 if (tflag) { 1701 /* concatenated strings are illegal in traditional C */ 1702 warning(219); 1703 } 1704 $$ = $1; 1705 } 1706 | string2 T_STRING { 1707 $$ = catstrg($1, $2); 1708 } 1709 ; 1710 1711func_arg_list: 1712 expr %prec T_COMMA { 1713 $$ = funcarg(NULL, $1); 1714 } 1715 | func_arg_list T_COMMA expr { 1716 $$ = funcarg($1, $3); 1717 } 1718 ; 1719 1720point_or_arrow: 1721 T_STROP { 1722 symtyp = FMOS; 1723 $$ = $1; 1724 } 1725 ; 1726 1727point: 1728 T_STROP { 1729 if ($1 != POINT) 1730 error(249); 1731 } 1732 ; 1733 1734identifier: 1735 T_NAME { 1736 $$ = $1; 1737 } 1738 | T_TYPENAME { 1739 $$ = $1; 1740 } 1741 ; 1742 1743%% 1744 1745/* ARGSUSED */ 1746int 1747yyerror(char *msg) 1748{ 1749 error(249); 1750 if (++sytxerr >= 5) 1751 norecover(); 1752 return (0); 1753} 1754 1755static __inline int uq_gt(uint64_t, uint64_t); 1756static __inline int 1757uq_gt(uint64_t a, uint64_t b) 1758{ 1759 1760 return (a > b); 1761} 1762 1763static __inline int q_gt(int64_t, int64_t); 1764static __inline int 1765q_gt(int64_t a, int64_t b) 1766{ 1767 1768 return (a > b); 1769} 1770 1771#define q_lt(a, b) q_gt(b, a) 1772 1773/* 1774 * Gets a node for a constant and returns the value of this constant 1775 * as integer. 1776 * Is the node not constant or too large for int or of type float, 1777 * a warning will be printed. 1778 * 1779 * toicon() should be used only inside declarations. If it is used in 1780 * expressions, it frees the memory used for the expression. 1781 */ 1782static int 1783toicon(tnode_t *tn, int required) 1784{ 1785 int i; 1786 tspec_t t; 1787 val_t *v; 1788 1789 v = constant(tn, required); 1790 1791 /* 1792 * Abstract declarations are used inside expression. To free 1793 * the memory would be a fatal error. 1794 */ 1795 if (dcs->d_ctx != ABSTRACT) 1796 tfreeblk(); 1797 1798 if ((t = v->v_tspec) == FLOAT || t == DOUBLE || t == LDOUBLE) { 1799 i = (int)v->v_ldbl; 1800 /* integral constant expression expected */ 1801 error(55); 1802 } else { 1803 i = (int)v->v_quad; 1804 if (isutyp(t)) { 1805 if (uq_gt((uint64_t)v->v_quad, 1806 (uint64_t)INT_MAX)) { 1807 /* integral constant too large */ 1808 warning(56); 1809 } 1810 } else { 1811 if (q_gt(v->v_quad, (int64_t)INT_MAX) || 1812 q_lt(v->v_quad, (int64_t)INT_MIN)) { 1813 /* integral constant too large */ 1814 warning(56); 1815 } 1816 } 1817 } 1818 free(v); 1819 return (i); 1820} 1821 1822static void 1823idecl(sym_t *decl, int initflg, sbuf_t *rename) 1824{ 1825 char *s; 1826 1827 initerr = 0; 1828 initsym = decl; 1829 1830 switch (dcs->d_ctx) { 1831 case EXTERN: 1832 if (rename != NULL) { 1833 if (decl->s_rename != NULL) 1834 LERROR("idecl()"); 1835 1836 s = getlblk(1, rename->sb_len + 1); 1837 (void)memcpy(s, rename->sb_name, rename->sb_len + 1); 1838 decl->s_rename = s; 1839 freeyyv(&rename, T_NAME); 1840 } 1841 decl1ext(decl, initflg); 1842 break; 1843 case ARG: 1844 if (rename != NULL) { 1845 /* symbol renaming can't be used on function arguments */ 1846 error(310); 1847 freeyyv(&rename, T_NAME); 1848 break; 1849 } 1850 (void)decl1arg(decl, initflg); 1851 break; 1852 case AUTO: 1853 if (rename != NULL) { 1854 /* symbol renaming can't be used on automatic variables */ 1855 error(311); 1856 freeyyv(&rename, T_NAME); 1857 break; 1858 } 1859 decl1loc(decl, initflg); 1860 break; 1861 default: 1862 LERROR("idecl()"); 1863 } 1864 1865 if (initflg && !initerr) 1866 prepinit(); 1867} 1868 1869/* 1870 * Discard all input tokens up to and including the next 1871 * unmatched right paren 1872 */ 1873static void 1874ignuptorp(void) 1875{ 1876 int level; 1877 1878 if (yychar < 0) 1879 yychar = yylex(); 1880 freeyyv(&yylval, yychar); 1881 1882 level = 1; 1883 while (yychar != T_RPARN || --level > 0) { 1884 if (yychar == T_LPARN) { 1885 level++; 1886 } else if (yychar <= 0) { 1887 break; 1888 } 1889 freeyyv(&yylval, yychar = yylex()); 1890 } 1891 1892 yyclearin; 1893} 1894